addendum

[ uh-den-duh m ]

/ əˈdɛn dəm /

a thing to be added; an addition.

an appendix to a book.

Machinery.

the radial distance between the tip of a gear tooth and the pitch circle of a gear or the pitch line of a rack.Compare dedendum.
Also called addendum circle. an imaginary circle touching the tips of the teeth on a gear.

Origin of addendum

1785–95; neuter singular of Latin addendus to be added, gerundive of addere to add

When Sisley released a photo of the addendum, taken by a friend in the legislature, reporters flooded Biggs with questions.

Why Did America’s Only Pot Researcher Suddenly Get Fired? |Abby Haglage |July 10, 2014 |DAILY BEAST
Hopefully you could include it as an addendum if not actually include it within the article itself.

Renounced Racist Derek Black Speaks Out |Caitlin Dickson |July 30, 2013 |DAILY BEAST
That felt like cheating, I imagined my own reaction to reading a book and then finding such an addendum at the end.

Speak, Faulty Memory: Why Memoir Writing Is Harder Than You Think |Dave Bry |April 3, 2013 |DAILY BEAST
Mike Brown had noted that the names of the women who were pregnant have an addendum, “and her unborn child.”

The Sept. 11 Survivor Tree in Bloom |Michael Daly |March 24, 2012 |DAILY BEAST

An addendum to this story comes from the aforementioned “best friend” decorator, John Wiltgen.

The Real Grifter of Beverly Hills |Diane Dimond |September 15, 2011 |DAILY BEAST
In his pocket was a bottle, carefully corked, empty save for a little roll of paper, which proved to be the addendum to the log.

Dracula |Bram Stoker
Natalenko re-read the addendum, pursed his thick lips and sighed.

Lone Star Planet |Henry Beam Piper and John Joseph McGuire
So, without apology, Webb offered an addendum to the conversation that had begun ten miles away.

Heart of the West |O. Henry
On the other hand the addendum to the book of Judges, chaps.

Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 2 |Various
This last arc defines the addendum of the escape-wheel teeth.

Watch and Clock Escapements |Anonymous

addendum

/ (əˈdɛndəm) /

something added; an addition

a supplement or appendix to a book, magazine, etc

the radial distance between the major and pitch cylinders of an external screw thread

the radial distance between the pitch circle and tip of a gear tooth

C18: from Latin, literally: a thing to be added, neuter gerundive of addere to add